Get the following file from your ArkCase contact: arkcase.war. Note, unfortunately this file is too large to store in the ArkCase Github distribution repository. Soon we will have another official location for the war files.
Drop the arkcase.war into the Tomcat webapps folder. Watch the server catalina.out log file to ensure the arkcase.war deployed successfully.
NOTE, at this time the arkcase webapp is not fully functional; it is only experimental. Only the ACM webapp is usable right now.